Definition
To get a Critical means to gain a special effect upon rolling the highest value of a qualifying die, or meeting some other condition to trigger non-standard critical.
Trigger
Critical Effects trigger whenever a player rolls a 12 on a non-meta d12 die. Upon doing so, the die 'explodes', and the player may roll an additional Meta-d12 (md12), gaining a versatile bonus that can be used only for that specific check or interaction. Generally, only ToHit and Skill checks can trigger Criticals, and only if the dice is not a meta-die. Other dice rolls, rolled numbers and meta-dice can only override this rule via the use of Metaphors, Traits, Meta-abilities, or any other qualifying external effect or influence.
Critical Effects
Skill Checks
When a Critical is triggered on Skill checks, the default versatile bonus grants a Skill bonus to help succeed on the check. If the check would be successful without it, the character can instead gain +1 Morale bonus instead.
ToHit Checks
When a Critical is triggered on a ToHit/Attack roll, the versatile bonus is defaults to a ToHit Bonus to increases the chances of successfully landing the hit. If the attack would normally succeed in spite of this bonus, it can be changed to inflict additional damage or a status magnitude instead. Critical Hits For damaging attacks, Criticals also deal increased damage! By default, a Critical Hit increases the damage dealt by that attack by x2.0, and if it has any status magnitudes, the defenders suffers Disadvantage against saving throws against it. If the target of an attack is bigger than the attacker, the attacker's damage is instead multiplied by the larger creature's Size-rating as Precision damage. By default, the maximum multiplier for this precision damage is four times the attacker's Size-Rating. (Size-1 can deal up to Size-4 damage, Size 4 can deal up to Size-16 damage).